581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
/* Test setjmp interoperability with static dlopen BZ #21895.
|
|
Copyright (C) 2017-2022 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <setjmp.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <dlfcn.h>
|
|
|
|
/* Set TOC area pointed by sp to zero. */
|
|
#define SET_TOC_TO_ZERO(sp) \
|
|
({ \
|
|
unsigned int zero = 0; \
|
|
asm volatile ("std %0, 24(%1)\n\t" :: "r" (zero), "r" (sp)); \
|
|
})
|
|
|
|
static void
|
|
bar (jmp_buf jb, unsigned long sp)
|
|
{
|
|
static int i;
|
|
if (i++==1)
|
|
exit(0); /* Success. */
|
|
|
|
/* This will set TOC are on caller frame (foo) to zero. __longjmp
|
|
must restore r2 otherwise a segmentation fault will happens after
|
|
it jumps back to foo. */
|
|
SET_TOC_TO_ZERO(sp);
|
|
longjmp(jb, i);
|
|
}
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
void *h = dlopen("setjmp-bug21895.so", RTLD_NOW);
|
|
if (!h)
|
|
{
|
|
puts(dlerror());
|
|
return 1;
|
|
}
|
|
|
|
void (*pfoo)(void) = dlsym(h, "foo");
|
|
if (!pfoo)
|
|
{
|
|
puts(dlerror());
|
|
return 1;
|
|
}
|
|
|
|
void (**ppbar)(jmp_buf, unsigned long) = dlsym(h, "bar");
|
|
if (!ppbar)
|
|
{
|
|
puts(dlerror());
|
|
return 1;
|
|
}
|
|
|
|
*ppbar = bar;
|
|
pfoo();
|
|
|
|
for(;;);
|
|
}
|
|
|
|
#include <support/test-driver.c>
|